Nut-lock.



No. 856,219. PATBN'TED JUNE 11, 1907.

J. 0. BROADFOOT. 4

NUT LOOK. APPLICATION FILED BEPT.13.1906.

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anbewtoz JACOB O. BROADFOOT, OF GORDON, TEXAS.

NUT-LOCK.

Specification of Letters Patent.

Patented June 11, 1907.

Application filed September 13,1906. $eria1N0 334,496.

To a whom it may concern:

Be it known that I, JACOB OSCAR BROAD- FOOT, a citizen of the UnitedStates, residing at Gordon, in the county of Palo Pinto and State ofTexas, have invented certain new and useful Improvements in Nut-Locks;and I do declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in nut locks of that class inwhich the nuts are looked upon their bolts.

The object of the invention is to provide a device of this character,which will be simple and practical, easy to apply and remove and veryeffective for the purpose intended.

IVith the above and other objects in view, the invention consists incertain novel features of construction, combination and arrangement ofparts hereinafter described and claimed.

In the accompanying drawings,-Figure 1 is a perspective view, showing anut locked upon its bolt in accordance with the invention; Fig. 2 is alongitudinal sectional view through the same; Fig. 3 is atransversesectional view, taken on the plane indicated by the line 33 in Fig. 2;Fig. 4 is a perspective view of the inner face of the nut; and Fig. 5 isa perspective view of the locking pin or rey.

Referring to the drawings by numeral, 1 denotes a bolt of the usual formpassing through an object or objects 2 of any description, and havingupon its threaded end 3 a nut 4. A washer 5 of the usual form ispreferably placed upon the bolt between the obj act 2 and the nut 4,which latter may be of any suitable form and construction.

In the practice of the invention, the nut 4 is formed in its under orinner face with a radially or tangentially-extending groove 6. Thisgroove extends from one side face of the nut to the threaded centralopening therein and is adapted to receive the bent end 7 of a lockingpin or key 8, preferably constructed of flexible metal. The long arm orend 9 of this locking key projects angularly from the short end 7 and ispreferably slightly tapered from its inner to its outer portion.Theangle at which the two ends 7, 9, are disposed with respect to eachother, is preferably slightly less than a right angle, and the shortgroove 6, so that when a locking band 10 is driven down over the top ofthe nut and upon the outer face of the end 9 of the locking key, the end7 will be forced by said band inwardly and will be caused to engage orbite the thread 3 in the bolt 1. The nut will be thus efiectively lockedagainst rotation upon the bolt, as will be seen with reference to Figs.2 and 3 of the drawings.

The retaining band 10 is endless and of a form corresponding to that ofthe nut over which it is adapted to snugly fit. In driving this banddown upon the nut, it will be seen that it will force the end 8 of thelocking key tightly against the nut and thereby drive the end 7inwardly. 'The' end 8 of the locking key is of suflicient length toproject above the outer face of the nut, so that it may be bentdownwardly over the band 10, as shown at 11, in order to effectivelylock the band upon the nut.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood without requiring a more extendedexplanation.

Various changes in the form, proportion, and the minor details ofconstruction may be resorted to without departing fromthe principle orsacrificing any of the advantages of this invention, as defined by theappended claims.

I-Iaving thus described my invention, what I claim as new, and desire tosecure by Lettors-Patent, is

1. In a nut lock, the combination with a bolt, of a nut screwed thereonand having a groove or channel extending from one of its faces to thecentral threaded opening therein, a locking key engaged with one face ofthe nut and having a portion to enter said groove and engage the threadsof the bolt, and a band to fit over the nut and said key to retain thelatter upon the nut and force it into engagement with the threads of thebolt, said key having its projecting end bent over upon said band toretain the latter upon said nut.

2. In a nut lock, the combination with a bolt, of a nut screwed thereonand having in its bottom face a tangentially-extending groove openinginto the threaded aperture in the nut and upon one side face of the nut,an angular locking key having a short end seated in said groove and along end engaged end 7 is of slightly greater length than the i withsaid side face of the nut, and a band to fit over the nut and the longend of said key In testimony whereof I have hereunto set v i to retainthe latter upon the nut and to my hand in presence of two witnesses.

force its short end into en a ement with the x V threads of the bolt,the lOlTg end of said loek- JAQOB BROADFOO'P' 5 ing key being bent oversaid band to retain Witnesses:

the latter upon the nut substantially as W. A. CHAPMAN,

shown and described. J. D. MONTGOMERY.

